Up for buy it now is a western electric 300B vacuum tube (1976 date) The tube tested strong at 79% ip and 86% gm on an Amplitrex AT1000 tube tester (as photographed).
Up for buy it now is a western electric 300B vacuum tube (1976 date) The tube tested strong at 79% ip and 86% gm on an Amplitrex AT1000 tube tester (as photographed).